Stable: 2.5.2
Development: 2.6-alpha3
I just want to put this out there, as I spent a while scratching my head over it.
Make sure you install libsamplerate-devel rather than just the libsamplerate library for Resampling support. haha, I should have clicked to this a lot earlier.
This is under Scientific Linux/RHEL 6.3, whith MOC compiled from source.